I find it very unusual and quite ridiculous that if i want to change the order in which i send my emails and which emails are sent in my series, that i can't just reschedule and prioritize them when i want. You should give your users the ability, simple editing and rescheduling the sequence function. I can't even unschedule certain emails at this time, at least it's not showing them as unscheduled. I find the editing of your AR functionality very antiquated.